Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1998-12-23
2000-11-07
Jackson, Stephen W.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307 102, 307 107, B60L 100
Patent
active
061441112
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a current interrupter, with a contact element between the two connecting parts for its electrical connection and with an auxiliary drive for separating the two connecting parts.
A current interrupter of this kind is known from DE 44 02 994 A1. The contact element, for example, is designed as a surrounding spring basket and also assumes the function of keeping the two connecting parts in an operating position. This results in a connection between the two connecting parts that is difficult to access mechanically. This also allows the danger to persist during manufacturing that the two connecting parts will not be entirely placed 100% in their most effective position. The result is that the function of the current interrupter may not be guaranteed in all cases. The function depends on the efficacy of the auxiliary drive.
In DE 44 02 994 A1, the auxiliary drive is provided by a propellant charge that is ignited (if necessary) and generates a specific amount of gas. Since it is an explosive body, the quantity of explosive is measured exactly and is as small as possible. The quantity is set for the case in which the two connecting parts are located exactly in the active position. If this is not the case, the gas quantity generated may not suffice to reliably separate the other connecting parts from one another. On the other hand, the quantity of explosive cannot be made overly large, since if the two connecting parts are in their proper effective position, this leads to an excessive acceleration of the two contact parts, which in turn is a dangerous situation.
The possibility of omitting the contact part while ensuring both the function of the electrical junction and the retaining force at the location of the electrical backward snap connection with the aid of a (press) fit, does not achieve the object of the present invention. The fit depends on the manufacturing tolerances of the contact surfaces on the one hand and the curve of the pressing force as the two connecting parts are being fitted together, on the other hand. These influential parameters are problematic during the process and result in considerable manufacturing expense, since the pressing force must be guided during the pressing process, for example. Simultaneously, as a result of increased manufacturing cost, where the two connecting parts join the tolerance between the two connecting parts must be kept small.
The object of the invention is to provide a current interrupter which, from a manufacturing standpoint, functions in a safe, reliable and simple manner.
This and other objects and advantages are achieved by the current interrupter, in which the spatial separation of the electrical junction and the location where the retaining force is applied also offers the possibility of adjusting this retaining force independently of the electrical connection. It is then possible not to initially apply the retaining force during manufacture, for example, and to fit the two connecting parts together in a simple loose manner. The electrical junction is then ensured. It is only after manufacture is complete, and it is possible to separate the two connecting parts from one another at any time, that the retaining force is applied by suitable means. This can be accomplished by welding the two connecting parts together, for example.
The possibility of simply separating the two connecting parts from one another, during manufacture for example, and then fitting them together again is achieved most simply where the contact element (as is known) is a circumferential spring basket. However, the dimensions must be adapted to the transverse force so that this transverse force not only produces a good electrical contact, but does not produce a frictional connection between the two connecting parts.
In contrast to the possibility of applying the retaining force by welding the two connecting parts, an advantageous design of the current interrupter is obtained if the retaining force is applied by a housing t
REFERENCES:
patent: 2983801 (1961-05-01), Billiard
patent: 3120591 (1964-02-01), Lewis et al.
patent: 5602371 (1997-02-01), Kerns et al.
Albiez Robert
Fahrnbauer Bernhard
Groebmair Maximilian
Krappel Alfred
Auto-Kabel Hausen GmbH & Co. Betriebs-KG
Bayerische Motoren Werke Aktiengesellschaft
Jackson Stephen W.
Polk Sharon
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